I planted yarrow in my iris beds and it grew to about four and a half foot and shaded my iris from the sun. Can I cut yarrow back in the spring so it doesn't get so tall?
Definitely you can do this.
To be honest, I don't think yarrow is afraid of anything. Go ahead and whack it back: chances are it'll just keep on truckin'.
I had a patch of it one year and the lawn boy I hired didn't know it was a plant and mowed right over it. . . to the ground. . . when it came back it was prettiest it had ever been. . . you can trim it all season in my opinion. . .
This post was edited by babera on Thu, Jul 31, 14 at 21:57